Check the hosts file. I have the same problem. If you have entries, your client computer sends the computer name that it finds in the first controller entry as its name. The controller completes the DNS query for the name it received.
So, in my case, let's say my first entry is: 127.0.0.1 abcd
abcd.yourdomain.com, , . , hosts, ( , DNS , ).
, , , , , .